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From: Adrian Chadd <adrian@FreeBSD.org>
Date: Tue, 7 Jan 2014 01:17:28 +0000 (UTC)
To: src-committers@freebsd.org, svn-src-all@freebsd.org,
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Subject: svn commit: r260384 - in head/sys: conf kern
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Author: adrian
Date: Tue Jan  7 01:17:27 2014
New Revision: 260384
URL: http://svnweb.freebsd.org/changeset/base/260384

Log:
  Add a compile-time control over the size of KN_HASHSIZE.
  
  This is needed for applications that use a lot of non-filedescriptor
  knotes.
  
  MFC after:	1 week
  Sponsored by:	Netflix, Inc.

Modified:
  head/sys/conf/options
  head/sys/kern/kern_event.c

Modified: head/sys/conf/options
==============================================================================
--- head/sys/conf/options	Tue Jan  7 00:38:22 2014	(r260383)
+++ head/sys/conf/options	Tue Jan  7 01:17:27 2014	(r260384)
@@ -128,6 +128,7 @@ GEOM_VOL	opt_geom.h
 GEOM_ZERO	opt_geom.h
 KDTRACE_HOOKS	opt_global.h
 KDTRACE_FRAME	opt_kdtrace.h
+KN_HASHSIZE	opt_kqueue.h
 KSTACK_MAX_PAGES
 KSTACK_PAGES
 KTRACE

Modified: head/sys/kern/kern_event.c
==============================================================================
--- head/sys/kern/kern_event.c	Tue Jan  7 00:38:22 2014	(r260383)
+++ head/sys/kern/kern_event.c	Tue Jan  7 01:17:27 2014	(r260384)
@@ -30,6 +30,7 @@
 __FBSDID("$FreeBSD$");
 
 #include "opt_ktrace.h"
+#include "opt_kqueue.h"
 
 #include <sys/param.h>
 #include <sys/systm.h>
@@ -250,7 +251,10 @@ SYSCTL_UINT(_kern, OID_AUTO, kq_calloutm
 #define	KNL_ASSERT_UNLOCKED(knl) do {} while (0)
 #endif /* INVARIANTS */
 
+#ifndef	KN_HASHSIZE
 #define	KN_HASHSIZE		64		/* XXX should be tunable */
+#endif
+
 #define KN_HASH(val, mask)	(((val) ^ (val >> 8)) & (mask))
 
 static int